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Durable tunnel paving structure

A durable and paving technology, applied in the field of transportation engineering, can solve problems such as poor workability, potential safety hazards and construction, and poor durability of tunnel pavement

Inactive Publication Date: 2015-08-26
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the poor durability and poor skid resistance of the tunnel pavement when the emulsified asphalt or slurry seal layer is used as the waterproof adhesive layer and the conventional road asphalt mixture is used as the pavement layer in the prior art , there are defects such as potential safety hazards and poor construction workability, and a durable tunnel pavement pavement structure and pavement method are provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The pavement method of the durable tunnel pavement of the present embodiment comprises the following steps:

[0064] (1) Sandblast the cement concrete slab to remove the surface laitance; use a synchronous crushed stone sealer to spread rubber asphalt and gravel, the amount of rubber asphalt per square meter is 2.2kg, and the amount of gravel per square meter is 12.0kg, The particle size of the crushed stone is 9.5mm-13.2mm. It is compacted with a 25-ton rubber-tyred road roller and rolled three times. The thickness of the rubber asphalt crushed stone seal layer is 1.0cm;

[0065](2) To pave the lower layer, first pave 4cm of OGFC-13 with a void rate of 20%, after natural cooling, pour cement-based mortar, use a small vibratory roller to assist grouting, and use a sweeper to remove the surface cement laitance after initial setting , natural maintenance for 3-5 days, forming a 4cm perfusion semi-flexible mixture pavement lower layer;

[0066] (3) according to 0.5kg / m 2...

Embodiment 2

[0071] The pavement method of this implementation durable type tunnel pavement comprises the following steps:

[0072] (1) Sandblast the cement concrete slab to remove the surface laitance; use a synchronous gravel sealer to spread rubber asphalt and gravel, the amount of rubber asphalt per square meter is 2.0kg, and the amount of gravel per square meter is 10.0kg, The particle size of the crushed stone is 9.5mm-13.2mm. It is compacted with a 25-ton rubber-tyred road roller and rolled three times. The thickness of the rubber asphalt crushed stone seal layer is 1.5cm;

[0073] (2) To pave the lower layer, first pave 5cm of OGFC-16 with a void ratio of 22%. After natural cooling, pour cement-based mortar, use a small vibratory roller to assist grouting, and use a sweeper to remove the surface cement laitance after initial setting , natural maintenance for 3-5 days, forming a 5cm perfusion semi-flexible mixture pavement lower layer;

[0074] (3) According to 0.4kg / m 2 Sprinkle ...

Embodiment 3

[0079] The pavement method of the durable tunnel pavement of the present embodiment comprises the following steps:

[0080] (1) Sandblast the cement concrete slab to remove the surface laitance; use a synchronous crushed stone sealer to spread rubber asphalt and gravel, the amount of rubber asphalt per square meter is 2.2kg, and the amount of gravel per square meter is 12.0kg, The particle size of the crushed stone is 9.5mm-13.2mm, and it is compacted with a 25-ton rubber-tyred road roller, rolling twice, and the thickness of the rubber asphalt crushed stone seal layer is 1.5cm;

[0081] (2) To pave the lower layer, first pave 6cm of OGFC-20 with a void rate of 25%, after natural cooling, pour cement-based mortar, use a small vibratory roller to assist grouting, and use a sweeper to remove the surface cement laitance after initial setting , keep in good health for 3-5 days, and form a 6cm perfusion semi-flexible mixture pavement lower layer;

[0082] (3) according to 0.5kg / m ...

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Abstract

The invention discloses a durable tunnel paving structure, which sequentially comprises a rubber asphalt gravel sealing layer, a pouring-type semi-flexible mixture paving lower layer, a modified emulsified asphalt bonding layer and a high-modulus warm mixing flame-retardant asphalt mixture paving upper layer from bottom to top. The durable tunnel paving structure provided by the invention has the advantages that the anti-track capability and anti-crack performance of the pavement are obviously enhanced; the durability is greatly improved; the anti-slip function of the paving surface is ensured; the problem of potential fire safety hazards of asphalt pavement is solved; the asphalt pavement construction temperature is lowered; energy sources are saved; emission is reduced; the construction simplicity is improved; only the surface maintenance and repair are needed in daily life; the integral repeated repair is avoided; and the investment is reduced in the whole life cycle.

Description

technical field [0001] The invention relates to the field of transportation engineering, in particular to a durable tunnel pavement structure. Background technique [0002] With the rapid development of my country's transportation infrastructure construction, my country's tunnel construction has made brilliant achievements. Tunnel pavement is an important part of tunnel engineering, and its performance directly determines the traffic capacity and service level of the tunnel, and also largely affects the public's evaluation of the quality of the tunnel. However, tunnel roads have not received sufficient attention for a long time, and emulsified asphalt or slurry seals are generally used as waterproof bonding layers, and conventional road asphalt mixtures are used as pavement layers. The positioning of the ancillary works of the tunnel structure, the use of road pavement structures and traditional pavement materials have made it difficult for the tunnel pavement to meet the s...

Claims

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Application Information

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IPC IPC(8): E01C7/32
CPCY02A30/30
Inventor 郑晓光麻旭荣
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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